Govt Exams
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Topics in Placement Papers
A worker can complete a task in 10 days. How much work will be done in 3 days?
Correct Answer:
C. 30%
EXPLANATION
Work done per day = 1/10 = 10%. In 3 days = 3 × 10% = 30%
If the cost price is Rs. 500 and profit percentage is 25%, what is the profit amount?
Correct Answer:
B. Rs. 125
EXPLANATION
Profit = 25% of 500 = 0.25 × 500 = 125
A box contains 3 red balls, 4 blue balls, and 5 green balls. What is the probability of drawing a red ball?
Correct Answer:
A. 1/4
EXPLANATION
Total balls = 3 + 4 + 5 = 12. P(red) = 3/12 = 1/4
The ratio of ages of A and B is 5:3. If A is 20 years old, how old is B?
Correct Answer:
B. 12 years
EXPLANATION
A:B = 5:3. If A = 20, then 5x = 20, so x = 4. B = 3x = 3(4) = 12 years
In a class of 60 students, 35% are girls. How many boys are there?
Correct Answer:
C. 39
EXPLANATION
Girls = 35% of 60 = 21. Boys = 60 - 21 = 39
A man invests Rs. 5000 at 8% per annum simple interest. How much will be his total amount after 3 years?
Correct Answer:
A. Rs. 6200
EXPLANATION
Simple Interest = (P × R × T)/100 = (5000 × 8 × 3)/100 = 1200. Total = 5000 + 1200 = 6200
A shopkeeper buys an item for Rs. 800 and sells it at a profit of 20%. What is the selling price?
Correct Answer:
B. Rs. 960
EXPLANATION
Selling Price = Cost Price + Profit = 800 + (20% of 800) = 800 + 160 = 960
If 15% of x is 45, what is 25% of x?
Correct Answer:
B. 75
EXPLANATION
15% of x = 45, so x = 45/0.15 = 300. Then 25% of 300 = 0.25 × 300 = 75
A train travels 120 km in 2 hours and then 180 km in 3 hours. What is the average speed of the train for the entire journey?
Correct Answer:
B. 60 km/h
EXPLANATION
Total distance = 120 + 180 = 300 km. Total time = 2 + 3 = 5 hours. Average speed = 300/5 = 60 km/h
If the compound interest on ₹8,000 at 10% per annum for 2 years is compounded annually, find the compound interest earned.
Correct Answer:
A. ₹1,680
EXPLANATION
CI = P(1 + r/100)^n - P = 8000(1 + 10/100)^2 - 8000 = 8000(1.1)^2 - 8000 = 8000(1.21) - 8000 = 9,680 - 8,000 = ₹1,680.